SMV1408-040LF

Overview

The SMV1408-040LF is a silicon abrupt junction tuning varactor diode from the Skyworks SMV1405 to SMV1430 series, housed in an SOD-882 surface-mount package. It features a typical capacitance of 2.90 pF at 1 V reverse bias and 1.71 pF at 4 V. The device exhibits a minimum capacitance ratio of 4.1 (C0/C30) and a maximum series resistance of 0.60 Ω at 500 MHz. It supports a maximum reverse voltage of 30 V and operates within a temperature range of -55 °C to +125 °C.

Feature Summary

• Designed for Voltage Controlled Oscillators requiring tight capacitance tolerances
• Low series resistance suitable for high-Q resonators in wireless systems
• Packages rated MSL1, 260 °C per JEDEC J-STD-020

Applications

• High-Q resonators in wireless system VCOs
• High volume commercial systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance and lead-free status via official datasheets. Check Moisture Sensitivity Level (MSL1) handling requirements before soldering. Ensure storage conditions prevent moisture absorption prior to reflow assembly.

Selection Notes

Select based on required capacitance values at specific reverse voltages. Compare series resistance and Q-factor against phase noise requirements. Verify operating temperature range compatibility with system constraints. Consider package dimensions and tape-and-reel specifications for automated assembly processes.

Part Context

Part of the SMV1405 to SMV1430 family of plastic-packaged abrupt junction tuning varactors. Designed for frequencies above 10 GHz in wireless applications. Characterized for capacitance over temperature variations.

Replacement Considerations

SMV1405-040LF: Higher series resistance (0.80 Ω), lower Q (3200). SMV1413-040LF: Higher capacitance (6.40 pF @ 1V), lower series resistance (0.35 Ω). SMV1430-040LF: Lower capacitance (0.88 pF @ 1V), higher series resistance (3.15 Ω). All share identical packaging and electrical limits.